Merge branch 'pci/controller/tegra'

- Correct the devm_kcalloc() argument order (Alok Tiwari)

- When asserting PERST#, disable the controller instead of mistakenly
  disabling the PLL twice (Nagarjuna Kristam)

- Convert struct tegra_msi mask_lock to raw spinlock to avoid a lock
  nesting error (Marek Vasut)

- Rename 'root_bus' to 'root_port_bus' for clarity (Manivannan Sadhasivam)

* pci/controller/tegra:
  PCI: tegra194: Rename 'root_bus' to 'root_port_bus' in tegra_pcie_downstream_dev_to_D0()
  PCI: tegra: Convert struct tegra_msi mask_lock into raw spinlock
  PCI: tegra194: Fix duplicate PLL disable in pex_ep_event_pex_rst_assert()
  PCI: tegra: Fix devm_kcalloc() argument order for port->phys allocation

Author: bjorn-helgaas

drivers/pci/controller/dwc/pcie-tegra194.c

@@ -1284,7 +1284,7 @@ static int tegra_pcie_bpmp_set_pll_state(struct tegra_pcie_dw *pcie,
 static void tegra_pcie_downstream_dev_to_D0(struct tegra_pcie_dw *pcie)
 {
 	struct dw_pcie_rp *pp = &pcie->pci.pp;
-	struct pci_bus *child, *root_bus = NULL;
+	struct pci_bus *child, *root_port_bus = NULL;
 	struct pci_dev *pdev;
 
 	/*
@@ -1297,19 +1297,19 @@ static void tegra_pcie_downstream_dev_to_D0(struct tegra_pcie_dw *pcie)
 	 */
 
 	list_for_each_entry(child, &pp->bridge->bus->children, node) {
-		/* Bring downstream devices to D0 if they are not already in */
 		if (child->parent == pp->bridge->bus) {
-			root_bus = child;
+			root_port_bus = child;
 			break;
 		}
 	}
 
-	if (!root_bus) {
-		dev_err(pcie->dev, "Failed to find downstream devices\n");
+	if (!root_port_bus) {
+		dev_err(pcie->dev, "Failed to find downstream bus of Root Port\n");
 		return;
 	}
 
-	list_for_each_entry(pdev, &root_bus->devices, bus_list) {
+	/* Bring downstream devices to D0 if they are not already in */
+	list_for_each_entry(pdev, &root_port_bus->devices, bus_list) {
 		if (PCI_SLOT(pdev->devfn) == 0) {
 			if (pci_set_power_state(pdev, PCI_D0))
 				dev_err(pcie->dev,
@@ -1736,9 +1736,9 @@ static void pex_ep_event_pex_rst_assert(struct tegra_pcie_dw *pcie)
 				ret);
 	}
 
-	ret = tegra_pcie_bpmp_set_pll_state(pcie, false);
+	ret = tegra_pcie_bpmp_set_ctrl_state(pcie, false);
 	if (ret)
-		dev_err(pcie->dev, "Failed to turn off UPHY: %d\n", ret);
+		dev_err(pcie->dev, "Failed to disable controller: %d\n", ret);
 
 	pcie->ep_state = EP_STATE_DISABLED;
 	dev_dbg(pcie->dev, "Uninitialization of endpoint is completed\n");

drivers/pci/controller/pci-tegra.c

@@ -14,6 +14,7 @@
  */
 
 #include <linux/clk.h>
+#include <linux/cleanup.h>
 #include <linux/debugfs.h>
 #include <linux/delay.h>
 #include <linux/export.h>
@@ -270,7 +271,7 @@ struct tegra_msi {
 	DECLARE_BITMAP(used, INT_PCI_MSI_NR);
 	struct irq_domain *domain;
 	struct mutex map_lock;
-	spinlock_t mask_lock;
+	raw_spinlock_t mask_lock;
 	void *virt;
 	dma_addr_t phys;
 	int irq;
@@ -1344,7 +1345,7 @@ static int tegra_pcie_port_get_phys(struct tegra_pcie_port *port)
 	unsigned int i;
 	int err;
 
-	port->phys = devm_kcalloc(dev, sizeof(phy), port->lanes, GFP_KERNEL);
+	port->phys = devm_kcalloc(dev, port->lanes, sizeof(phy), GFP_KERNEL);
 	if (!port->phys)
 		return -ENOMEM;
 
@@ -1581,29 +1582,27 @@ static void tegra_msi_irq_mask(struct irq_data *d)
 	struct tegra_msi *msi = irq_data_get_irq_chip_data(d);
 	struct tegra_pcie *pcie = msi_to_pcie(msi);
 	unsigned int index = d->hwirq / 32;
-	unsigned long flags;
 	u32 value;
 
-	spin_lock_irqsave(&msi->mask_lock, flags);
-	value = afi_readl(pcie, AFI_MSI_EN_VEC(index));
-	value &= ~BIT(d->hwirq % 32);
-	afi_writel(pcie, value, AFI_MSI_EN_VEC(index));
-	spin_unlock_irqrestore(&msi->mask_lock, flags);
+	scoped_guard(raw_spinlock_irqsave, &msi->mask_lock) {
+		value = afi_readl(pcie, AFI_MSI_EN_VEC(index));
+		value &= ~BIT(d->hwirq % 32);
+		afi_writel(pcie, value, AFI_MSI_EN_VEC(index));
+	}
 }
 
 static void tegra_msi_irq_unmask(struct irq_data *d)
 {
 	struct tegra_msi *msi = irq_data_get_irq_chip_data(d);
 	struct tegra_pcie *pcie = msi_to_pcie(msi);
 	unsigned int index = d->hwirq / 32;
-	unsigned long flags;
 	u32 value;
 
-	spin_lock_irqsave(&msi->mask_lock, flags);
-	value = afi_readl(pcie, AFI_MSI_EN_VEC(index));
-	value |= BIT(d->hwirq % 32);
-	afi_writel(pcie, value, AFI_MSI_EN_VEC(index));
-	spin_unlock_irqrestore(&msi->mask_lock, flags);
+	scoped_guard(raw_spinlock_irqsave, &msi->mask_lock) {
+		value = afi_readl(pcie, AFI_MSI_EN_VEC(index));
+		value |= BIT(d->hwirq % 32);
+		afi_writel(pcie, value, AFI_MSI_EN_VEC(index));
+	}
 }
 
 static void tegra_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
@@ -1711,7 +1710,7 @@ static int tegra_pcie_msi_setup(struct tegra_pcie *pcie)
 	int err;
 
 	mutex_init(&msi->map_lock);
-	spin_lock_init(&msi->mask_lock);
+	raw_spin_lock_init(&msi->mask_lock);
 
 	if (IS_ENABLED(CONFIG_PCI_MSI)) {
 		err = tegra_allocate_domains(msi);